Hi everyone, I have a question regarding crossfire on different PCI-E bandwidths. I currently have a 6850 and I'm wondering if i get another one, will my current motherboard bottleneck it due to having only a x16/x4 lane?
Will it be a good upgrade? I'm planning to play Diablo 3, guild wars 2, and maybe some BF3 in the future.
Here are my specs:
windows 7 32 bit
core i5 3570k ( stock 3.4 ghz)
4 gb 1333 ram
HD Radeon 6850 1 gb
Cooler Master 650W PSU
good cpu motherboard and psu but why do you have a 32bit windows and only 4gb of 1333 before you buy the gpu upgrade these 2 things or maybe only the ram but upgrade it to 8gb of 1600 please before you get the next gpu
More than 4 gigs of RAM on 32 bit windows is a waste.
Money is better spent on another 6850.
You will see a small performance loss (~10-15% i think) on the x4 slot compared to running it on a x8 or x16 slot. Shouldn't be too bad - I would do it myself in your situation.
From some googling:
There are many misconceptions about the memory limit in 32-bit Windows OSes.
First of all, when I say RAM, this includes every kind of RAM. So not just regular, but also your video RAM.
The maximum available amount of RAM per process for a 32-bit OS is 2 GB. If you have a 64-bit OS, a 32-bit process can allocate up to 4 GB.
Additionally, the entire OS can only address 4 GB for every process combined, while 64-bit OSes can allocate 8 TB.
Also interesting is that this limit adds up to the paged pool. This means that a 32-bit OS cannot use more than 2 GB total, which means 6 GB for all applications including virtual memory. Of course, this has nothing to do with RAM, because the other 2 GB would be stored in the paging file, limited to your hard-drive's speed.
Thanks, i read that the performance drop from to x16/4 isnt significant enough to hamper gameplay. I just wanted reassurance. Do you think i will be able to play most modern games at full 1080p max settings with Crossfire 6850s?
I have 2 crossfired 6850s and they play everything at 1080p with Max or near max settings at 60fps with Vsync on. I hate it when the frames dip below 60 (even to 55fps) so I drop the graphics a little in some cases. I'm very happy with the results.
thanks for the information regarding CF 6850, makes me more confident to just save some money and add another one to save some cash and not have to spend it on a GTX 670. I just hope i dont encounter the micro stuttering as well.